=)
We thought he would grow out of it, but he still pees (usually on our feet) whenever someone comes in, or pees all over the floor after he comes inside from a walk.
He does not stop or raise his leg, so I doubt it is marking. He just runs and pees, even if he just had the opportunity to pee outside.
更新1:
It's never a lot of pee, usually just a few drops... but enough to have to wipe up afterwords. He also pees when you pick him up, but I'm guess that he can't help himself. (small dog, small tummy + big hand pressing bladder)
更新2:
We've been to the vet (this has been going on for a while) and he has nothing physically wrong with him. He's just a very jumpy and excitable little guy.